U.S. patent number 4,450,625 [Application Number 06/377,390] was granted by the patent office on 1984-05-29 for material handling and shearing attachment for a backhoe.
This patent grant is currently assigned to Allied Gator, Inc.. Invention is credited to John Ramun, Michael Ramun.
United States Patent |
4,450,625 |
Ramun , et al. |
* May 29, 1984 |
Material handling and shearing attachment for a backhoe
Abstract
A material handling and shear attachment for a backhoe enables
the backhoe to be used in grasping and moving structural beams,
pipes, cables, and the like and pivotally positions a cutting blade
in the form of a hook on the end of a backhoe boom for actuation by
a piston and cylinder of the backhoe. A fixed blade is secured to
the boom forming a shear point between the movable cutting blade
and the fixed blade. The fixed and movable blades are shaped and
positioned relative to their pivotal engagement to move objects
being sheared toward the blades pivotal engagement rather than away
therefrom as in the prior art shears.
Inventors: |
Ramun; Michael (Youngstown,
OH), Ramun; John (Youngstown, OH) |
Assignee: |
Allied Gator, Inc. (Youngstown,
OH)
|
[*] Notice: |
The portion of the term of this patent
subsequent to March 15, 2000 has been disclaimed. |
Family
ID: |
26948765 |
Appl.
No.: |
06/377,390 |
Filed: |
May 12, 1982 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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261679 |
May 7, 1981 |
4376340 |
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Current U.S.
Class: |
30/134; 30/225;
83/609 |
Current CPC
Class: |
E02F
3/964 (20130101); Y10T 83/8815 (20150401) |
Current International
Class: |
E02F
3/96 (20060101); E02F 3/04 (20060101); E02F
003/28 () |
Field of
Search: |
;30/131,134,225
;37/117.5 ;414/722,724,740 ;144/34E ;294/104 ;83/609 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Kazenske; E. R.
Assistant Examiner: Watts; Douglas D.
Attorney, Agent or Firm: Harpman & Harpman
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No.
261,679 filed May 7, 1981, now U.S. Pat. No. 4,367,340.
Claims
Although but one embodiment of the present invention has been
illustrated and described, it will be apparent to those skilled in
the art that various changes and modifications may be made therein
without departing from the spirit of the invention and having thus
described our invention what we claim is:
1. A cutting and manipulating attachment for a backhoe, the bucket
of which has been removed, and having a boom with a controlled
piston and cylinder assembly connected thereto, comprising:
a mounting body and means for attaching the same to the boom of the
backhoe;
means positioning a fixed cutting blade on said mounting body and
means located at a first end of said fixed cutting blade pivotally
mounting a movable cutting blade on said mounting body in pivotal
relation to said fixed cutting blade from an open position to a
closed, workpiece shearing, position;
means for keeping a cutting portion of said movable cutting blade
in shearing relation to said fixed cutting blade through the entire
extent of the shearing movement of the blades with respect to each
other;
said movable blade having an elongated substantially hook-shaped
end portion hooked generally toward said fixed blade;
said means for keeping the cutting portion of said movable cutting
blade in shearing relation to said fixed cutting blade comprising:
a pair of spaced parallel guides located adjacent and fixed to a
second end of said fixed cutting blade and extending from said
fixed cutting blade second end and defining an elongated guide
path, said guide path being positioned and sized to receive said
hook-shaped end portion of said movable hook-shaped cutting blade
before said cutting portion of said movable blade comes into
shearing action with respect to a workpiece disposed between said
blades, so that said hook-shaped end portion and said pair of
guides hold the workpiece for cutting as said movable cutting blade
cutting portion moves in shearing relation with said fixed blade;
and said movable cutting blade having a pair of cutting blade
portions arranged in a sharp V-shape on a plane offset with respect
to said fixed blade, said cutting blade portions positioned so that
said blade portions and said fixed blade form a generally V-shape
when in said open position, and cage a workpiece therein and urge
the workpiece generally toward said pivotal mounting means during
movement to the closed position; and
means for operatively connecting said movable cutting blade to said
piston and cylinder assembly so that the same can be moved relative
to said fixed blade thereby from said open to said closed
positions, and vice-versa.
2. A device as recited in claim 1 wherein said pair of spaced
parallel guides extend from said fixed cutting blade second end at
an obtuse angle with respect to said fixed cutting blade.
3. A device as recited in claim 2 wherein a hardened cutting bar is
attached to the respective engaging edge of said fixed blade for
operative engagement with said movable cutting blade portions.
4. A device as recited in claim 3 wherein a hardened cutting bar is
attached to the respective cutting blade portions of said movable
blade, for cooperation with said hardened cutting bar attached to
said fixed blade.
5. A device as recited in claim 2 wherein said mounting body is
positioned on said boom on the opposite side of said boom from said
piston and cylinder assembly.
Description
BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to attachment for backhoes as commonly used
in industry and particularly in dismantling industrial
buildings.
(2) Description of the Prior Art
Prior devices of this type are best represented in our U.S. Pat.
No. 4,188,721 which shows a backhoe attachment for cutting and
moving cables or the like.
Other prior art is represented by U.S. Pat. No. 4,198,747 which
discloses a hydraulic shear for a backhoe in which a pair of fixed
blades are arranged in spaced relation and a movable blade is
arranged for movement therebetween in a shearing action.
In the present invention there is only a single fixed blade and a
single movable blade and the device is workable in cutting large
sections of steel beams, pipes, and the like, in a shearing action
with the material between the blades being guided up toward the
pivot point and then sheared. The arrangement of a guide slot
positioned in spaced relation to the fixed blade and in which a
hook-shaped blade extension engages and moves prior to an actual
shearing operation helps maintain the shearing action of the device
and insures retention of material between said blades.
SUMMARY OF THE INVENTION
A material handling and shearing attachment for a backhoe comprises
a fixed blade having a movable hook-shaped cutting blade pivoted
thereto positioned on the end of a backhoe boom in place of a
normal bucket. A pair of pivotal arms are secured to the cutting
blade and to a hydraulic piston and cylinder on the backhoe. A
blade guide is positioned in spaced parallel relation to the fixed
blade and forms means for confining the movable blade to a path
alongside the fixed blade where it will operate to cut material in
a scissors-like shearing action when it is moved by the hydraulic
piston and cylinder.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevation of the material handling and shear
attachment with the hook-shaped blade in open position;
FIG. 2 is an end elevation thereof;
FIG. 3 is a side elevation of the material handling and shear
attachment with the hook-shaped blade in semi-closed position;
and
FIG. 4 is a back perspective view of the material handling and
shear attachment with the blade in partially closed position.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Backhoes such as used in industry are powered machines having an
extensible boom with hydraulic controlled cylinders mounted
thereon. A bucket is normally attached to the end of the boom and
is moved by one or more hydraulic piston and cylinder assemblies.
Applicant's device is an attachment for a backhoe that is used in
place of the bucket for handling and shearing and moving structural
beams, pipes, cables and other structural members and the like
normally found in structures being dismantled.
As will be seen in the drawings, a backhoe boom 10 has a transverse
pivot 11 positioned therethrough near its outer end and an
apertured plate 12 thereon inwardly of the outer end. A mounting
body 13 is secured to the boom 10 on the lower surface thereof as
illustrated in FIGS. 1 and 3 of the drawings by fasteners 14
positioned therethrough and through the apertured plate 12 and by
spaced apertured lugs 15 on the mounting body 13 engaged on the
pivot pin 11. Gussets 16 on the mounting body 13 are also engaged
on the pivot pin 11 which can take the form of a suitable bolt and
nut assembly.
The opposite or lower side of the mounting body 13 carries a
triangular blade supporting body member 17 to which a pair of
hardened steel blades 18A and 18B are attached by several fasteners
19 and a pair of spaced parallel angular guides 20 are attached to
the triangular blade supporting body 17 at an angle to the blade 18
so as to form an elongated slot S into which a portion of a
hook-shaped cutting blade 21 may move in a scissorslike shearing
action relative to the fixed blade 18. The hook-shaped cutting
blade 21 has a pair of hardened steel blades 22A and 22B attached
by a plurality of fasteners 19 and is pivotally mounted on the
mounting body 13 by a pivot pin 35 engaged in spaced brackets 23
which are in turn attached to the lower side of the mounting body
13. The hardened steel blades 22A and 22B are positioned in angular
relation to one another which when engaged against the hardened
steel blades 18A and 18B define a generally triangular space
therebetween. (See FIG. 3).
A support frame 24 forms the actual point of pivotal engagement
with the pin 35 and the support frame 24 being positioned on the
side of the hook-shaped cutting blade 21 opposite the fixed cutting
blade 18 where it adds rigidity to the hook-shaped cutting blade
21. The improved configuration of the hook-shaped cutting blade 21
and hardened steel blades positioned thereon is important to the
operation of the device as the portion of the blade 21 beyond the
hardened cutting edge portions 22 curves outwardly and upwardly
with respect to the cutting blade portion 22B to form a relatively
large hook shape which will engage and substantially register with
the slot S between the spaced parallel angularly disposed guides 20
considerably before the cutting edge portion 22B of the blade comes
into a gathering and shearing action with respect to an article
therein to be sheared.
In FIG. 1 of the drawings, the hook-shaped cutting blade 21 is
shown in open position and it will be observed that due to the
hook-shaped end 26 thereof the attachment may be used to grasp and
hold and pull and/or lift beams, pipes, cables, or the like to be
moved and sheared and that upon the closing of the hook-shaped
cutting blade 21 as seen in FIG. 3 of the drawings, the material
will be forced upward towards the point of pivotal engagement of
the blades and held against movement away from the blade area
during the shearing action as the blades 22A and 18A close in a
shearing action at a point of maximum load as defined adjacent the
pivot pin 35.
In order that the hook-shaped cutting blade 21 can be moved in a
material grasping, holding or pulling or shearing action, one or
more piston and cylinder assemblies are used and these may comprise
the piston and cylinder assemblies normally found on a back hoe
boom and normally used to operate the bucket thereon.
In the present disclosure the arrangement illustrated includes two
pistons and hydraulic cylinders 27 with piston rods 28 thereof
engaged on links 29 by pivots 30 with the links 29 being pivotally
attached to brackets 31 on the opposite sides of the hook-shaped
cutting blade 21 by a blade pivot pin 32. Secondary links 33 are
also engaged on the pivot pins 30 and on boom pivot pins 34 so that
the movable end of the cylinders 27 will remain in spaced relation
to the boom 10 of the backhoe when the material handling and
shearing attachment disclosed in the present invention is used.
The efficiency of the shearing attachment is further enhanced by
the right angular disposition of the cutting blade 21 to the
backhoe boom 10. The cutting blade 21 in open position is at a
90.degree. angle in relation to the boom 10 with the supporting
body member 17 and blades 18A and 18B at an angle less than
90.degree. to the boom 10. The cutting blade 21 in closed position
is nearly parallel to the mounting body 13.
The device of the present disclosure is similar to that of our U.S.
Pat. No. 4,188,721 and comprises an improvement with respect
thereto particularly with respect to the mounting arrangement and
configuration of the hook-shaped cutting blade 21, the position of
the hardened steel blades 18A and 18B thereon, and the provision of
the spaced parallel angular guides 20, which being attached to one
another at their opposite ends define an elongated slot S as
hereinbefore described in which the hook end 26 of the hook-shaped
cutting blade 21 initially registers and is substantially engaged
when the actual shearing action of a work piece by the device takes
place.
The construction is such that the device can and does handle beams,
pipes, cables and other structural members that were incapable of
being handled by the device of our U.S. Pat.No. 4,188,721 primarily
because in the present disclosure the material is completely caged
by or encircled by the V-shaped portions of the hook-shaped cutting
blade 21 and the spaced parallel angular guides 20. The
configuration of the cutting blade 21 is such that the hardened
steel V-shaped cutting blades 18A and 18B positioned thereon forces
the work piece therebetween upwardly towards the pivot pin 35 and
the point of maximum shearing force.
* * * * *